of Ginsburg & Feldman in Washington, D.C., before returning to Harvard Law School in 1965, where in 1976 he became the Felix Frankfurter Professor of Law. Chayes developed a new international law course at Harvard and co-authored a widely used book, International Legal Process. He also taught civil procedure and authored a widely cited article in the Harvard Law Review on the legal remedies and the difficulty of dealing with domestic social issues legally. He became professor emeritus in 1993, but continued to teach until incapacitated by complications from pancreatic cancer. After leaving the Kennedy administration, Chayes remained politically active. He worked on the 1968 presidential campaign of Senator Robert F. Kennedy, wrote articles on nuclear arms control, co-authored a book with Jerome Wiesner, President Kennedy's Science Adviser, on Anti-Ballistic Missiles and strategic policy, and advised Democratic members of the Senate in the debate in the early 1970s over ABM deployment (he was a strong supporter of the ABM Treaty of 1972). In 1972, Chayes advised the presidential campaign of George McGovern on foreign policy matters, and in 1976 was a foreign policy adviser to the presidential campaign of Jimmy Carter. In the 1980s, Chayes argued on behalf of the Government of Nicaragua against the United States in the seminal International Court of Justice (ICJ) case Nicaragua v. United States. The ICJ ruled that the U.S. was guilty of "unlawful use of force" when it mined Nicaragua's harbors. Chayes also wrote articles arguing that the Reagan Administration was barred from testing and deployment of the Strategic Defense Initiative (SDI), or "Star Wars" under the 1972 ABM Treaty. Publications Before returning to Harvard Law, Chayes received a grant from the Carnegie Corporation to publish The Cuban Missile Crisis. In this publication, Chayes illuminated the interrelations of law and foreign policy decisions that created what many call the finest hour of Kennedy's Administration. In doing so, he reinforced the notion that “law is not a set of fixed, self-defining categories of permissible and prohibited conduct” but instead is a dynamic set of normative rules that can guide foreign policy decision-makers. In his book, Chayes focused his analysis on three major decisions: 1) the choice of the quarantine, as opposed to harsher or milder responses, 2) the decision to seek an O.A.S. authorizing resolution, and 3) the manner and method of the approach to the U.N. analysis of the situation. In doing so,